The Best Root Beer Thread !

What has been the best Root Beer you have had?. I have been to several resturants that claim to make their own but i am pretty sure that the best i have had has been some cold out of the can A&W Root Beer.

Fifty years ago A&W at one of their shops was fantastic. The drive in stuff these days is nowhere near as good and the canned stuff is terrible. I think finding good root beer is as difficult as finding good ginger ale or ginger beer. And both are well worth the search.